<!DOCTYPE html>
<html>
  <head>
    <title>Hello Huxley!</title>
    <link href="//netdna.bootstrapcdn.com/twitter-bootstrap/2.3.2/css/bootstrap-combined.min.css" rel="stylesheet" />
    <script src="//cdnjs.cloudflare.com/ajax/libs/zepto/1.0/zepto.min.js"></script>
    <script>
      $(document).ready(function() {
        $('#toggleLink').click(function() {
          $(this).toggleClass('btn-primary');
        });
      });
    </script>
  </head>
  <body>

    <div class="container">
      <h1>My test app</h1>

      <p><a href="javascript:;" id="toggleLink" class="btn">Click me to toggle!</a></p>
    </div>
  </body>
</html>
